Thing is, disparity is not a bad thing. Right now Alphonso Davies is a far better football player (when he's not injured!) than most of the other pro players out there; ditto Connor McDavid when it comes to hockey. Do those disparities make football or hockey worse games? No.
Why not? Because while those individuals might dominate right now, they won't be at their peaks forever; and others will rise to take their places.
Inherent disparity makes those games MUCH worse if you aspire to be more than a spectator at the highest levels. You can argue that it makes them better entertainment, but I don't think disparity makes them better games.
Whereas in a tabletop game, we don't have to have random disparity. So why should we? We control all the variables. Nobody is born with a certain size, brain, personality, etc.
Another example: look at the MCU and the power disparities between the original six Avengers. In a straight-up fight Thor or Hulk would wipe the floor with either of Hawkeye or Black Widow.
And yet when the chips were down they worked fine as a party.
As a form of entertinment, 100%. But if you were actually playing them as a TTRPG, I suspect the person playing Hawkeye would feel pretty useless in most situations when compared to the person playing Thor, once the dice start rolling. Yes, a skilled DM could try to balance things ("Oh look, another trap that involves pinpoint accuracy!"), but most of the time, it's not gonna feel like you're contributing much.
If D&D was pure roleplay, this becomes less of an issue. But it's still a game. With a lot of rules and a lot of rolls. Balance is normally very important in games. When we play
Eldritch Horror, each character is different and you can argue about which are better or worse overall, but it is clear that the designers were at pains to make them as close to equal as possible. Ditto
Pandemic, or whatever. Same for almost all TTRPGS that
aren't D&D or D&D clones like
Pathfinder.
Going back to my example, would soccer be a better game if we randomly assigned some kids to have an extra disadvantage at the start, like one less shoe? I think we all agree that no, it would not. It doesn't make sense to make the parts of the game that you can control unfair. People inherently rebel at that.
I played D&D for years when rolling was the only method, and I can't think of one time when the game was improved by some players having better ability score totals than others. And I can think of lots of times when it was a problem. Maybe not a huge problem, but it was there.